ECM had an article on children's deaths in 2002:
Electrocution is the fifth leading cause of accidental death in the United States, according to the National Electrical Safety Foundation (NESF). According to the U.S. Consumer Product Safety Commission (CPSC), one person is electrocuted in the home every 24 hours. Electrocution, however, is not limited to children, as evidenced by OSHA statistics that demonstrate one person is electrocuted in the workplace every 36 hours.
If childproofing fixtures costs the US $2 billion/year (just throwing that number out, I have no supporting figures for it) and cuts the number of electrocuted children by half, that's roughly $10 million per life saved.